Reading #443
193Moderatebkc-01.prananet.eth · cell te7u6n · 7/11/2026, 02:42:00 IST
PM2.5
87.8 µg/m³
PM10
87.8 µg/m³
Temperature
21.5 °C
Humidity
68.1 %
Arkiv entity
Open in Arkiv explorer ↗- Entity key
- 0x99493141d7956f62059d56a4097cae8b931773308a59eea5b62201a625e51a22
- Written by (relayer wallet)
- 0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
- Expires
- 10/11/2026, 02:43:07 IST (3 days after the reading)
- Queryable attributes
- device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793999520nonce = 443pm25_x10 = 878pm10_x10 = 878simulated = false
- Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 443).ownedBy(0x3a1f21f1c6f05efa35bb7178274b41c8873cca67)
Check it yourself
Your browser just repeated the check the Readings contract does on-chain. The relayer only pays gas: changing any value would break the signature.
- ✓Step 1
Rebuild the 264-byte message
# Field Type Bytes Value Packed hex 1 device address 20 0x4379c30ae56431f0485731f6e730ee0084e955c0 0x4379c30ae56431f0485731f6e730ee0084e955c0 2 epoch uint256 32 1793999520 0x000000000000000000000000000000000000000000000000000000006aee42a0 3 pm25_x10 uint256 32 878 0x000000000000000000000000000000000000000000000000000000000000036e 4 pm10_x10 uint256 32 878 0x000000000000000000000000000000000000000000000000000000000000036e 5 temp_x10 int256 32 215 0x00000000000000000000000000000000000000000000000000000000000000d7 6 hum_x10 uint256 32 681 0x00000000000000000000000000000000000000000000000000000000000002a9 7 nonce uint256 32 443 0x00000000000000000000000000000000000000000000000000000000000001bb 8 chainId uint256 32 11155111 0x0000000000000000000000000000000000000000000000000000000000aa36a7 9 readingsContract address 20 0x9192Fc053e1493EB2B7355192aa3F8e57AAE01d8 0x9192fc053e1493eb2b7355192aa3f8e57aae01d8 abi.encodePacked, no padding between fields. chainId and contract stop replay on other chains. Total: 264 bytes. - …Step 2
Hash it with keccak256
… - …Step 3
Recover the signer from the EIP-191 signature
r 0xb5988d5d826b67c9f5db9a8d36dcf24ff0f6a247e7c20b67f0ad15c04f44e7a5s 0x0451cd9a2ffedb3ff93ced92e98b53d34b09ffe9b79fa5f250f5c1506a6f3293v 28recovered … - …Step 4
Compare with the registered device key
registered 0x4379c30ae56431f0485731f6e730ee0084e955c0 - ✓Step 5
Nonce strictly increases
Nonce 443 follows #441, so this reading can't be replayed. - ✓Step 6
Cross-checked against neighbours
Not flagged. The value agrees with neighbouring devices within the verifier's threshold.
Raw reading JSON
{
"device": "0x4379c30ae56431f0485731f6e730ee0084e955c0",
"ens": "bkc-01.prananet.eth",
"geohash": "te7u6n",
"epoch": 1793999520,
"pm25_x10": 878,
"pm10_x10": 878,
"temp_x10": 215,
"hum_x10": 681,
"nonce": 443,
"signature": "0xb5988d5d826b67c9f5db9a8d36dcf24ff0f6a247e7c20b67f0ad15c04f44e7a50451cd9a2ffedb3ff93ced92e98b53d34b09ffe9b79fa5f250f5c1506a6f32931c",
"simulated": false
}